src/SDL_internal.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 18 Oct 2017 08:52:04 -0700
changeset 11630 ad4b5d85edee
parent 10925 4de9d54bbc87
child 11726 27d08f1aab80
permissions -rw-r--r--
Fixed bug 3821 - Allow SDL_CreateWindow and SDL_CreateRenderer with OpenGL ES 3.0 (GLES3) for Angle (Windows)

Carlos

Angle supports GLES3 but when using these functions (SDL_CreateWindow and SDL_CreateRenderer), defaults again to GLES2.0.

A current workaround (hack) to retrieve a GLES3.0 context with Angle is:

1) set

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);

after InitSDL AND after calling SDL_CreateWindow (before SDL_CreateRenderer)

2) Comment lines 2032-2044 in SDL_render_gles2.c, funtion GLES2_CreateRenderer

window_flags = SDL_GetWindowFlags(window);
if (!(window_flags & SDL_WINDOW_OPENGL) ||
profile_mask != SDL_GL_CONTEXT_PROFILE_ES || major != RENDERER_CONTEXT_MAJOR || minor != RENDERER_CONTEXT_MINOR) {

changed_window = SDL_TRUE;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, RENDERER_CONTEXT_MAJOR);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, RENDERER_CONTEXT_MINOR);

if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
goto error;
}
}

This retrives a GLES3 context as confirmed using glGetString(GL_VERSION). This should be fixed by modifying a few if's.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef SDL_internal_h_
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#define SDL_internal_h_
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/* Many of SDL's features require _GNU_SOURCE on various platforms */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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/* This is for a variable-length array at the end of a struct:
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    struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
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   Use this because GCC 2 needs different magic than other compilers. */
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#if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM)
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#define SDL_VARIABLE_LENGTH_ARRAY 1
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#else
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#define SDL_VARIABLE_LENGTH_ARRAY
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#endif
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#include "dynapi/SDL_dynapi.h"
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#if SDL_DYNAMIC_API
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#include "dynapi/SDL_dynapi_overrides.h"
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/* force DECLSPEC and SDLCALL off...it's all internal symbols now.
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   These will have actual #defines during SDL_dynapi.c only */
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#define DECLSPEC
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#define SDLCALL
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#endif
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#include "SDL_config.h"
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#endif /* SDL_internal_h_ */
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/* vi: set ts=4 sw=4 expandtab: */